Investigators have all sorts of options, although it usually isnt too difficult to choose how to spend every action
Charizards next attack, Explosive Vortex, deals an even more staggering 330 damage but requires you to discard three Fire Energy from it to use it

"Riku of Two Reflections" Commander (0) Lands (38) 1 Alchemist's Refuge 1 Command Tower 1 Copperline Gorge 1 Temple of the False God 1 Thespian's Stage 1 Vivid Grove 1 Vivid Crag 1 Vivid Creek 1 Temple of Abandon 1 Temple of Mystery 1 Rootbound Crag 1 Hinterland harbor 1 Sulfur Falls 1 Izzet Boilerworks 1 Simic Growth Chamber 1 Gruul Turf 1 Breeding Pool 1 Steam Vents 1 Stomping Ground 8 Island 6 Forest 5 Mountain Rocks and Other Brown Stuff (16) 1 Sol Ring 1 Izzet Signet 1 Gruul Signet 1 Simic Signet 1 Fellwar Stone 1 Strionic Resonator 1 Illusionist's Bracers 1 Darksteel Ingot 1 Chromatic Lantern 1 Crystal Shard 1 Basalt Monolith 1 Trading Post 1 Thran Dynamo 1 Solemn Simulacrum 1 Gilded Lotus 1 Staff of Nin Dudes (27) 1 Coiling Oracle 1 Echo Mage 1 Wood Elves 1 Vithian Renegades 1 Borderland Ranger 1 Viridian Shaman 1 Eternal Witness 1 Somberwald Sage 1 Clone 1 Bloodbraid Elf 1 Fathom Mage 1 Oracle of Mul Daya 1 Archaeomancer 1 Mindclaw Shaman 1 Hypersonic Dragon 1 Prophet of Kruphix 1 Izzet Chronarch 1 Progenitor Mimic 1 Brutalizer Exarch 1 RubbleHulk 1 Hellkite Tyrant 1 Gruul Ragebeast 1 Deadeye Navigator 1 Prime Speaker Zegana 1 Molten Primordial 1 Diluvian Primordial 1 Terastodon Spells (18) 1 Artifact Mutation 1 Explore 1 Rampant Growth 1 Farseek 1 Treasure Hunt 1 Hinder 1 Spell Crumple 1 Rhystic Study 1 Far Wanderings 1 Beast Within 1 Harmonize 1 Parallel Lives 1 Control Magic 1 Rite of Replication 1 Bribery 1 Desertion 1 Tooth and Nail 1 Time Stretch Now, a 100% Riku deck would look a lot different

I am one that likes to keep the same types of sleeves for all my cards (its not really OCD, but its close)
and there is not a single white card to be seen
encoaching dragonstorm did in fact register as Encroaching Dragonstorm, and that helps a lot when Im flying through a decklist trying to upload it as fast as possible